sync/internal_api/public/attachments/on_disk_attachment_store.h - Issue 2130453004: [Sync] Move //sync to //components/sync.

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Issue 2130453004: [Sync] Move //sync to //components/sync. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Rebase. Created 4 years, 4 months ago

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1 // Copyright 2014 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 #ifndef SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_

6 #define SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_

7

8 #include <string>

9

10 #include "base/files/file_path.h"

11 #include "base/macros.h"

12 #include "base/memory/ref_counted.h"

13 #include "base/threading/non_thread_safe.h"

14 #include "sync/api/attachments/attachment.h"

15 #include "sync/api/attachments/attachment_id.h"

16 #include "sync/api/attachments/attachment_store.h"

17 #include "sync/api/attachments/attachment_store_backend.h"

18 #include "sync/base/sync_export.h"

19

20 namespace attachment_store_pb {

21 class RecordMetadata;

22 } // namespace attachment_store_pb

23

24 namespace base {

25 class SequencedTaskRunner;

26 } // namespace base

27

28 namespace leveldb {

29 class DB;

30 } // namespace leveldb

31

32 namespace syncer {

33

34 // On-disk implementation of AttachmentStore. Stores attachments in leveldb

35 // database in \|path\| directory.

36 class SYNC_EXPORT OnDiskAttachmentStore : public AttachmentStoreBackend,

37 public base::NonThreadSafe {

38 public:

39 // Constructs attachment store.

40 OnDiskAttachmentStore(

41 const scoped_refptr<base::SequencedTaskRunner>& callback_task_runner,

42 const base::FilePath& path);

43 ~OnDiskAttachmentStore() override;

44

45 // AttachmentStoreBackend implementation.

46 void Init(const AttachmentStore::InitCallback& callback) override;

47 void Read(AttachmentStore::Component component,

48 const AttachmentIdList& ids,

49 const AttachmentStore::ReadCallback& callback) override;

50 void Write(AttachmentStore::Component component,

51 const AttachmentList& attachments,

52 const AttachmentStore::WriteCallback& callback) override;

53 void SetReference(AttachmentStore::Component component,

54 const AttachmentIdList& ids) override;

55 void DropReference(AttachmentStore::Component component,

56 const AttachmentIdList& ids,

57 const AttachmentStore::DropCallback& callback) override;

58 void ReadMetadataById(

59 AttachmentStore::Component component,

60 const AttachmentIdList& ids,

61 const AttachmentStore::ReadMetadataCallback& callback) override;

62 void ReadMetadata(

63 AttachmentStore::Component component,

64 const AttachmentStore::ReadMetadataCallback& callback) override;

65

66 private:

67 friend class OnDiskAttachmentStoreSpecificTest;

68

69 // Opens leveldb database at \|path\|, creating it if needed. In the future

70 // upgrade code will be invoked from OpenOrCreate as well. If open fails

71 // result is UNSPECIFIED_ERROR.

72 AttachmentStore::Result OpenOrCreate(const base::FilePath& path);

73 // Reads single attachment from store. Returns nullptr in case of errors.

74 std::unique_ptr<Attachment> ReadSingleAttachment(

75 const AttachmentId& attachment_id,

76 AttachmentStore::Component component);

77 // Writes single attachment to store. Returns false in case of errors.

78 bool WriteSingleAttachment(const Attachment& attachment,

79 AttachmentStore::Component component);

80 // Reads single attachment_store_pb::RecordMetadata from levelDB into the

81 // provided buffer. Returns false in case of an error.

82 bool ReadSingleRecordMetadata(

83 const AttachmentId& attachment_id,

84 attachment_store_pb::RecordMetadata* record_metadata);

85 // Writes single attachment_store_pb::RecordMetadata to levelDB. Returns false

86 // in case of an error.

87 bool WriteSingleRecordMetadata(

88 const AttachmentId& attachment_id,

89 const attachment_store_pb::RecordMetadata& record_metadata);

90

91 static std::string MakeDataKeyFromAttachmentId(

92 const AttachmentId& attachment_id);

93 static std::string MakeMetadataKeyFromAttachmentId(

94 const AttachmentId& attachment_id);

95 static AttachmentMetadata MakeAttachmentMetadata(

96 const AttachmentId& attachment_id,

97 const attachment_store_pb::RecordMetadata& record_metadata);

98

99 const base::FilePath path_;

100 std::unique_ptr<leveldb::DB> db_;

101

102 DISALLOW_COPY_AND_ASSIGN(OnDiskAttachmentStore);

103 };

104

105 } // namespace syncer

106

107 #endif // SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_

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